WebRequest GetResponseAsync 405

Question

我使用webdav控制台应用程序，并且GetResponseAsync函数出现错误。

错误：远程服务器返回错误：（405）不允许的方法

public async Task GetFolder(string url)
    {
        var request = GetWebRequest(url, "PROPFIND");

        string query = @"<?xml version=""1.0"" encoding=""utf-8""?>   <propfind xmlns=""DAV:"">     <propname/>   </propfind>";
        var bytes = Encoding.UTF8.GetBytes((string)query);
        request.ContentLength = bytes.Length;
        request.ContentType = @"application/xml; charset=""utf-8""";

        request.Headers.Add("Depth", "1");

        var requestStream = request.GetRequestStream();
        requestStream.Write(bytes, 0, bytes.Length);
        requestStream.Close();

        var response = await request.GetResponseAsync();
        var responseStream = response.GetResponseStream();

        var reader = new XmlTextReader(responseStream);

        string output = "";

        while (reader.Read())
        {
            if (reader.Value.Contains("http"))
            {
                output += reader.Value.ToString() + "\n";
            }
        }

        Console.WriteLine(output);

        reader.Close();
        responseStream.Close();
        response.Close();
    }